Air-pump starter.



C. E. L. LIPMAN.

AIR PUMP STARTER. APPLIUATION FILED APB. 19, 191s.

1,126,041. Patent-,61h11. 26, 1915.

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l being driven CARL E. L. LIPMAN, OE IBELOIT, -WISCONSIN, ASSIG-NOB,LIPMAN AIB APPLIANcE COMPANY, ]?y BELOIT, WISCONSJIN, A yCORI?OIRALION0F WISCONSIN.

AIB-PUMP STARTER.

Specication of Lctterslaxtent.

Patented-Jan. 26, 1915.

Appimation mea Aprn 19, ma serial No. 769,369.

To all whom-t may concern: v

Be it known that I, CARL E. L. LIBMAN, a citizen of the United States,residing-at Beloit, in the county of Rock and.. State of VVisconsin,have invented certain new and useful Improvements in Air-Pulli Starters,of which the following is a speci cation.

This invention rela-tes to air pumps such as are adapted to furnish airto be used for the various purposes to which air unf der pressure isapplied, and more particularly to that type of air pump adapted to bedriven by a continuously rotating member and to furnish a supply of airuntil a predetermined pressure of air has been reached. In a-irappliance systems where such a type of air pump is employed, pumps havebeen continuously driven by a motive power t'maintain a certain pressureoff air inf the system -or air supply reservoir by automatic actuationof the pump valves to maintain such pressure. In this method, the pumpalthough not generating air is in constant operation, resulting. inunnecessary wear thereupon. The object of my invention is to provide anair pump having a clutch driving connection with the motive power and toprovide means operable by air pressure for actuating the clutch wherebythe pump will be operated supplying air until a predetermined pressurehas been attained, when said means will automatically disengage theclutch and stop the working of the pump. Vith this means for maintaininga pressure of air the valves in the pump are entirely independent fromany control other than their common operation, so that the onecontrolling means for actuating the entire pump answers for a multipleof pump cylinders.

In the accompanying drawings: Figure 1 illustrates an air pump havingapplied thereto my novel clutch actuating means which is shown in.longitudinal section, the pump by a common clutch drive. Fig. 2 is asimilar view with the pump driven from the opposite end by a chaindrive, the clutch shown disengaged.

A conventional multi-cylinder type air pump 1 is shown in outline, thatin Fig. 1 having splined on its crank-shaft 2 a sliding clutch member 3which is shown engaged with a constantly driven clutch member 1. Acasing 5 inclosing the clutch actuating means is carried to the nearside of the pump by. brackets 6 and is formedA with a cylinder 7. and acatch compartment 8. A.- piston 9 located in the cylinder, is formedwith a stem 10 which has a bearing-in one endl of the casing andprojects therethrough carrying a. yoked lever 11 in engagement with thetaperedp'eripheral head 12 located adjacent the inner end of theplunger, and a cap 13 which forms an abutment against which the coiled.vspring 14- exerts a tensionl to force the plunger to the right and todisenga-ge the clutch members. The end 15 of the casing` forms. aAclosed head for thel cylinder and a port 16 openingV into the cylinderadjacent this head communicates through pipe-17 with a valve or means-(not shown) under thel control of the operator by which at a desiredtime an initial charge of air is. delivered tothe cylinder 7 Pi'voted at18. isa catch having a head 19 held into engagement with the taperedhead 12 by the cap 20 which is yieldingly depressed and adjustable bythe spring 2l and screw 22, and an oppositely extending en d 23 uponwhich rests a plunger 24 located in the eX- tension neck 25. isdischarged therefrom through pipe 26 to a supply tank or to whatsoevermeans the airis to be put to use` and a pipe section 27 leads from thisdischarge 26 to the extension neck Assuming the pump to be continuouslydriven as the members are positioned in Fig. 1, airI will be dischargedfrom the pump through pipe 26 until a predetermined pressure of air hasbeen attained at this discharge side, when the pressure of air, which isupon plunger 21, will force said plunger down, thereby disengaging thecatch head 19 from the tapered head 12 and allowing spring 14 to movethe piston and stem to the right, throwing out the clutch connection andstopping the operation of the pump. It will be noticed that for theplunger 24 to be depressed the tension of spring 21 must e overcome,therefore by the adjustment of screw 22 the degree of air pressurerequired may be varied. When it is desired to put the pump intooperation, and to replenish the supply of air, air is admitted at willby the operator through pipe 17 to the cylinder 7, moving the piston tothe left, connecting the pump with the driving member and locking catchhead 19 with the piston mem- Air generated by the pump clutch member 3,a

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ber, thereby driving the pump until the required pressure has beenreached, when the pump will be stopped as above described In F ig. 2parts alike to those in Fig. 1 have like reference numerals, this figuremerely showing a diierent form of drive. In this form the crank-shaft 2extends beyond the right hand end of the pump, the constantly drivenclutch member 4 is chain driven, and the slidable clutch member 3:splined to the crank-shaft is actuated by the yolied lever 28 carriedbythe extension stem '29 formed at the head of piston 9, the stembearing in the end 15 of the casing. In this igure the clutch is showndisengaged and the actuating means therefore in an inoperative position.The operation of this type of clutch and actuating means is as the abovedescription applying to Fig. 1.

I claim as my invention.

l. In a mechanism of the character described, the combination with anair pump and a discharge pipe associated therewith, of means for drivingsaid pump, controlling means for rendering said driving means operativeor inoperatlve to drive said pur'n'p, means connected to saidcontrolling means actuated by Huid pressure to render the driving meansoperative, automatic means for actuating said last named means to rendersaid drivin means inoperative, means for throwing said automatic meansinto operation when the pressure in said discharge pipe has attained apredetermined degree, and means for applying fluid pressure at will tosaid controlling means to render the 'driving means operative.

2. In a mechanism ofthe character described, the combination of an airpump, means for driving said pump, a cylinder, a piston disposed in saidcylinder, a piston rod, a connection between said piston rod and saiddriving means whereby the driving means is renderedoperative orinoperative upon movement of the rod, a spring arranged to normallymaintain said driving means in inoperative position, a shoulder on saidpiston rod, a latch pivoted adjacent to said rod and adapted .to engagewith said shoulder, means for admitting at will fluid under pressure tosaid cylinder on one side of said piston whereby the piston is movedagainst the force Vof said spring to render said driving means operativeand dispose said shoulder in cooperative relation with said pivotedlatch, an adjustably mounted spring for urging said latch intoengagement with said shoulder, and pressure-operated means for releasingsaid latch against the force of said spring when the pressure in thedischarge from the pump reaches a predetermined point to thereby permitsaid driving means to be moved to inoperative position by said firstmentioned spring.

3. In a mechanism of the character described, the combination of an airpump, means for driving said pump, a cylinder, a

piston disposed in said cylinder, a piston i rod, a connection betweensaid piston rod and said driving means whereby the driving means isrendered operative or inoperative upon movement of the rod, a 'springarranged to normally maintain said ldriving means in inoperativeposition, a shoulder on said piston rod, a latch pivoted adjacent tosaid rod and adapted to engage with said shoulder, means for admittingat will Huid under pressure to said cylinder on one side of said pistonwhereby the piston is moved against the force of said spring to rendersaid driving means operative and dispose said shoulder in coperati'verelation with said pivoted latch, an adjustably mounted spring forurging said latch into engagement with said shoulder, and meanscontrolled by the pressure generated by the pump for releasing saidlatch against the force of said springyto thereby permit said drivingmeans to be moved to inoperative position by said rst mentioned spring.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

CARL n. L. MPMan.

vWitnesses JOHN 1". MOCONNER, Jr., E. D. E. N. BEHnL.

